Vulnerability-Lookup

GHSA-M857-R6WP-M3GV

Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-19 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

usb: typec: altmodes/displayport: validate count before reading Status Update VDO

A broken/malicious device can send the incorrect count for a status update VDO, which will cause the kernel to read uninitialized stack data and send it off elsewhere.

Fix this up by correctly verifying the count for the update object.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-63961"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T16:17:15Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: altmodes/displayport: validate count before reading Status Update VDO\n\nA broken/malicious device can send the incorrect count for a status\nupdate VDO, which will cause the kernel to read uninitialized stack data\nand send it off elsewhere.\n\nFix this up by correctly verifying the count for the update object.",
  "id": "GHSA-m857-r6wp-m3gv",
  "modified": "2026-07-19T18:31:47Z",
  "published": "2026-07-19T18:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63961"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64bd6ccc5799f8473d1f37d4d8f53093dfec5c02"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6ffdbcd7a02f3af8fff9b6519830369f574ed44c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/70e7045849e954e56dcbf441b6330e66bc996306"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/74aabe9ea30fdfba924fce9594e6aa69a596a4bb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77a759ec30bc5fb0dd9c867b711d0acfed6c7faa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8a18f896e667df491331371b55d4ad644dc51d60"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b10eff5abe6aa2a5af10ed17bddff76e3b6e6b9b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd7118c010f324497c275e8fd7a35c9baaa2a00f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-63961 (GCVE-0-2026-63961)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-20 06:41

Title

usb: typec: altmodes/displayport: validate count before reading Status Update VDO

Summary

In the Linux kernel, the following vulnerability has been resolved: usb: typec: altmodes/displayport: validate count before reading Status Update VDO A broken/malicious device can send the incorrect count for a status update VDO, which will cause the kernel to read uninitialized stack data and send it off elsewhere. Fix this up by correctly verifying the count for the update object.

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/74aabe9ea30fdfba9…
https://git.kernel.org/stable/c/dd7118c010f324497…
https://git.kernel.org/stable/c/6ffdbcd7a02f3af8f…
https://git.kernel.org/stable/c/70e7045849e954e56…
https://git.kernel.org/stable/c/64bd6ccc5799f8473…
https://git.kernel.org/stable/c/b10eff5abe6aa2a5a…
https://git.kernel.org/stable/c/77a759ec30bc5fb0d…
https://git.kernel.org/stable/c/8a18f896e667df491…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 , < 74aabe9ea30fdfba924fce9594e6aa69a596a4bb (git) Affected: 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 , < dd7118c010f324497c275e8fd7a35c9baaa2a00f (git) Affected: 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 , < 6ffdbcd7a02f3af8fff9b6519830369f574ed44c (git) Affected: 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 , < 70e7045849e954e56dcbf441b6330e66bc996306 (git) Affected: 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 , < 64bd6ccc5799f8473d1f37d4d8f53093dfec5c02 (git) Affected: 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 , < b10eff5abe6aa2a5af10ed17bddff76e3b6e6b9b (git) Affected: 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 , < 77a759ec30bc5fb0dd9c867b711d0acfed6c7faa (git) Affected: 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 , < 8a18f896e667df491331371b55d4ad644dc51d60 (git)
Linux	Linux	Affected: 4.19 Unaffected: 0 , < 4.19 (semver) Unaffected: 5.10.259 , ≤ 5.10.* (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.93 , ≤ 6.12.* (semver) Unaffected: 6.18.35 , ≤ 6.18.* (semver) Unaffected: 7.0.12 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/typec/altmodes/displayport.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
            },
            {
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              "status": "affected",
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              "status": "affected",
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              "versionType": "git"
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            }
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        },
        {
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          "programFiles": [
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          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.19"
            },
            {
              "lessThan": "4.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.259",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.93",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.35",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.259",
                  "versionStartIncluding": "4.19",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: altmodes/displayport: validate count before reading Status Update VDO\n\nA broken/malicious device can send the incorrect count for a status\nupdate VDO, which will cause the kernel to read uninitialized stack data\nand send it off elsewhere.\n\nFix this up by correctly verifying the count for the update object."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-20T06:41:41.563Z",
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          "url": "https://git.kernel.org/stable/c/6ffdbcd7a02f3af8fff9b6519830369f574ed44c"
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          "url": "https://git.kernel.org/stable/c/70e7045849e954e56dcbf441b6330e66bc996306"
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    "cveId": "CVE-2026-63961",
    "datePublished": "2026-07-19T14:55:50.993Z",
    "dateReserved": "2026-07-19T07:54:57.023Z",
    "dateUpdated": "2026-07-20T06:41:41.563Z",
    "state": "PUBLISHED"
  },
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-M857-R6WP-M3GV

CVE-2026-63961 (GCVE-0-2026-63961)

Tags

Sightings

Nomenclature